\documentclass[a4paper,10pt]{report}
\usepackage[utf8x]{inputenc}
\usepackage{graphicx}
\usepackage{titlepic}
%opening
\title{Sokoban Solver: A Parallel Approach from Forward and Reverse Scenarios}
\author{Sobokan team}
\titlepic{\includegraphics[width=\textwidth]{cover.jpg}}

\begin{document}

\maketitle
\tableofcontents 

\begin{abstract}
\input abstract
\end{abstract}

\chapter{Brief introduction to our approach}
\input intro

\chapter{ A star}
\input astar
\section{State and movement: configuration }
\input state
\section{Cost function : heuristics }
\label{sec:cost}
\input cost
\section{Deadlocks and Loops}
\input dead

\chapter{Pseudo Code}
\input psuedo

\chapter{Speed Up Techniques}
\input speed

\chapter{Conclusions and future work}
\input conclusion

\end{document}

\begin{thebibliography}{9}
\bibitem{ref1} wtf! 

\end{thebibliography}


